Laudrup's men beat St Gallen 1-0 on Thursday to make it two wins out of two in Europe, and the Dane understands the strain that his players must be feeling.
"After another Europa League game we have to focus back on the Premier League for this last game before the international break," he told reporters. "It will mean we have played seven games in 20 days, and we know it will be tough on Sunday.
"We also know we have a two-week break after this game, and when we come back to the Premier League after that we have three home games and an away game at Cardiff in the next four, so this is important for us.
"We have seven points, but we all knew the first seven games would be very tough. So let's see what we can get on Sunday. Winning always brings something extra, the players may be tired but we know we can relax after Sunday."
The Swans lie 13th in the league with two wins, a draw and three defeats from their six games so far.